Fire extinguisher



Dec. 27; 192-7.

P. G. MAC GREGOR FIRE EXTINGUI SHER Filed April 22. 1927 gwvemtow 02a in f 35 GttOLMQ W 7 Patented Dec. 27, 1927.

STATES PATENT l 'l 'tfili.

GltAHAlll MAGGRLG-GR, 0F PEQCTANNOCK, NEW JERSEY, ASSIGNOR TO PYEENE MAN "U FACTU Ell-1G COMPANY, OF NEQVARK, NEV JERSEY, A CORIE'GBATION O DEL- .FiWARE.

FIRE nxrineuisnnn.

Application fil ed April 22, 1927. Serial No. 185,753.

This invention relates to fire extinguishers of the type employing a receptacle having a vent and adapted to carry a. fire extinguish ing liquid which is expelled from the receptacle by means of a pump projecting into the receptacle and having an operating handle located exterior-1y of the receptacle.

The general object of the invention is to provide, in fire extinguisher of the type above mentioned, a novel means for locking the pump handle so that it may be used as a handle by which the fire extinguisher may be readily moved from place to place, and to provide a vent-closing means which will be effective when the extinguisher is not in use and will be ineffective while the extinisher is in use. These objects are attained, in the manner hereinafter described, by a combined handle-locking and vent-clos Eng means, such that when the pump handle is locked against movement the vent is closed, and when the pump handle is released for operation the vent is opened.

The invention will be understood from the following description, talren in connection with the accompanying drawings, in which Figure 1 is a tragmental vertical sectional view of a fire extinguisher embodying the invention, the fire extinguisher pump being shown in elevation; Figure 2 is a fragmental elevation or" the top of the extinguisher viewed from the right in Figure 1; and Figure 3 is a sectional view taken on the line 3-3 of Figure The extinguisher embodying this invention is herein shown as including areceptacle 3 adapted for the reception of a tire extinguishing liquid 4 to be ejected or forced from the receptacle by means of a double acting reciprocating pump 5, removably connected to the receptacle and projecting into the same. The pump 5 includes a pump head 6 which is provided with a flange 7 carrying packing disc 8 adapted to seat upon a screw-threaded collar 9 to which the pump 5 is connected by a flange ring 10. In operating the pump 5, the fire extinguishing liquid 4 is delivered to the pump head 6' on both the outward and inward strokes of the pump handle 11 and from the pump head 6 the liquid is forced outthrough an outlet pipe 12 carried by the pump head and adapted for the reception of a suitable hose not shown.

The pump head 6 is formed with an upwardly projecting tubular lug 13 into which is fitted a. relatively short tube 14:, the tubular lug 13 and the tube 14L being adapted to communicate with the interior of the re reptacle 3 and to serve as a vent for such receptacle, whereby air is allowed to enter asthe-fire extinguisher liquid l is ejected by the pump 5. i 1

Vv hen the extinguisher is not in use, the

operating handle 11 is moved into its posi 7 ends to the pump head 6 by screws 17 or the like. The keeper 16 is formed at its. free end with a hook-like portion 18 which is adapted to enter the handle 11 and engage the same when the keeper is moved from its dotted line position, shown in Figure 1,

to its locking position shown in full lines in Figures 1 and 2. lVith the keeper 16 in its locking position, the operating handle 11 is effectively restrain-ed against outward movement and is so held with reference to the pump head 6 that it serves as a. carrying handle for the extinguisher.

One leg of the keeper 16 is provided with an extension or housing which is formed with a valve chamber 20 adapted for the re ception of a valve which includes a slidable disc-like valve member 21. The disc-like valve member 21 is formed with a. depend ing flange or. skirt 22 within which is held suitable packing material 23 adapted to engage and close or seal the upper end of the tube 14: when the keeper 16 is moved from its dotted line position, shown in Figure 1, to its locking position shown in full lines in Figures 1 and 2. While the keeper 16 is in its locking position, the packing mate rial 28 is maintained under compression by a compression spring 25 carried within the chamber 20, one end 01 the spring being in engagement with the disc-like valve member 21 and the other end thereof being in engagement with a screw-threaded plu 26 adapted to engage and close the upper or screwthreaded end of the chamber 20 after the spring 25 and the valve member 21 with lat) its packing material 23 have been intro duced into the barrel through the upper or screw-threaded end thereof.

From the above it is obvious that the vent closing device herein shown allords an effective means for closing the vent, which includes the tubular lug 13 and tube 14:, while the keeper 16 is in the locking position shown in full lines in Figures 1 and 2. By reason of the fact that the rentis main tained closed under such conditions, undue evaporation of the tire extinguisher liquid 4 Within the receptacle 3 is prevented. On the other hand, since it is necessary to, move the keeper 16 from its locking position shown in full. lines in Figures 1 and to substantially its dotted line position shown in Figure 1 before the pump can be oper ated, it follows thatopening of the vent, in-- eluding the pipe 1d and the tubular lug 13, is insured preparatory to ope rating the extinguisher.

It will be understood that changes and modifications may be made in the construction shown and above particularly described,

Without departing from the spirit of the in-.

vention as defined in'the following claims.

hat is claimed is: j

1. In a fire extinguisher, a liquid receptacle having a vent, a pump projecting into said receptacle and having an tmerating haudle located exterior-1y of said receptacle, locking means adapted to be moved into and out of engagenient with said handle, and vent closing means carried by said locking means for closing said vent when said loelc ing means is in handle engaging position.

2. In. a lire extinguisher, a liquid rccep taele having a vent, a pump projecting into said receptacle and having an operating handle located exteriorly of said receptacle, a keeper pivotally connected to said receptacle "and adapted to be moved. into and out of locking. engagement with said handle,

and vent closing means carried by said keeper for closing said vent when sald keeper in handle locking poslt-ion.

3. Ina fire extinguisher, a liquid receptacle having a vent, a pump projecting into said receptacle and having an operating handle located exteriorly of said receptacle, a keeper pivotally connected to said receptacle and adapted to be moved into and out of locking engagement with said handle, and spring pressed vent closing means carried by said keeper for closing said vent when said keeper is in handle locking position.

t. In a lire extinguisher, a liquid receptacle having an vent, a pump projecting into said receptacle and having an operating handle located exterior-1y of said rcceptturlc, locking means pivotally connected to said rcceptacle and adapted. to be moved into engagement with said handle to lock said handle and adapted to be moved out of engag. ement with said handle to permit operation of said pump, and vent closing means "arried by said locking means and adajiited to be moved into sealing position with respect to said vent when said locking means is moved into locking engagement With said handle and adapted to be moved out of ing position with respect to said vent upon movement o'l said locking means out of engagement with said handle.

In a tire extinguisher, a liquid receptacle, a pump projecting into said receptacle and includilig a head adapted to be detachably connected to said receptacle and provided with a vent leading into said receptaclc, said pump also including an operating handle adapted to assume a position adjacent said head, a keeper pivotally connected to said head and having its free end terminating in a hookdilze portion titltlllttttli to engage said handle, whereby said handle is locked in a: position adjacent said head, and vent-closing means carried by said keeper and adapted to close and open said vent; as said keeper is moved into and out; of locking position, said vent closing means including a housing, a valve member slidably mounted in said housing, and a spring confined within said housing and co-operating with said valve member to urge it into intimate en gagen'ient with said: vent upon u'iovel'nent at said keeper into locking position. In testimony whereof, I have alfixed ln l' signature to this specification.

PETER GRAHAM MAGGREGOR.

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